2 OpenSSL 0.9.2 06-Mar-1999
4 Copyright (c) 1998-1999 The OpenSSL Project
5 Copyright (c) 1995-1998 Eric A. Young, Tim J. Hudson
8 The OpenSSL Project is a collaborative effort to develop a robust,
9 commercial-grade, fully featured, and Open Source toolkit implementing the
10 Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1)
11 protocols with full-strength cryptography world-wide. The project is managed
12 by a worldwide community of volunteers that use the Internet to communicate,
13 plan, and develop the OpenSSL tookit and its related documentation.
15 OpenSSL is based on the excellent SSLeay library developed from Eric A. Young
16 and Tim J. Hudson. The OpenSSL toolkit is licensed under a dual-license (the
17 OpenSSL license plus the SSLeay license) situation, which basically means
18 that you are free to get and use it for commercial and non-commercial
19 purposes as long as you fullfill the conditions of both licenses.
21 The OpenSSL toolkit includes:
24 Implementation of SSLv2, SSLv3, TLSv1 and the required code to support
25 both SSLv2, SSLv3 and TLSv1 in the one server and client.
28 General encryption and X.509 v1/v3 stuff needed by SSL/TLS but not
29 actually logically part of it. It includes routines for the following:
32 libdes - EAY's libdes DES encryption package which has been floating
33 around the net for a few years. It includes 15
34 'modes/variations' of DES (1, 2 and 3 key versions of ecb,
35 cbc, cfb and ofb; pcbc and a more general form of cfb and
36 ofb) including desx in cbc mode, a fast crypt(3), and
37 routines to read passwords from the keyboard.
39 RC2 encryption - 4 different modes, ecb, cbc, cfb and ofb.
40 Blowfish encryption - 4 different modes, ecb, cbc, cfb and ofb.
41 IDEA encryption - 4 different modes, ecb, cbc, cfb and ofb.
44 MD5 and MD2 message digest algorithms, fast implementations,
45 SHA (SHA-0) and SHA-1 message digest algorithms,
46 MDC2 message digest. A DES based hash that is polular on smart cards.
49 RSA encryption/decryption/generation.
50 There is no limit on the number of bits.
51 DSA encryption/decryption/generation.
52 There is no limit on the number of bits.
53 Diffie-Hellman key-exchange/key generation.
54 There is no limit on the number of bits.
57 X509 encoding/decoding into/from binary ASN1 and a PEM
58 based ascii-binary encoding which supports encryption with a
59 private key. Program to generate RSA and DSA certificate
60 requests and to generate RSA and DSA certificates.
63 The normal digital envelope routines and base64 encoding. Higher
64 level access to ciphers and digests by name. New ciphers can be
65 loaded at run time. The BIO io system which is a simple non-blocking
66 IO abstraction. Current methods supported are file descriptors,
67 sockets, socket accept, socket connect, memory buffer, buffering, SSL
68 client/server, file pointer, encryption, digest, non-blocking testing
72 A dynamically growing hashing system
74 A Configuration loader that uses a format similar to MS .ini files.
77 A command line tool which provides the following functions:
79 enc - a general encryption program that can encrypt/decrypt using
80 one of 17 different cipher/mode combinations. The
81 input/output can also be converted to/from base64
83 dgst - a generate message digesting program that will generate
84 message digests for any of md2, md5, sha (sha-0 or sha-1)
86 asn1parse - parse and display the structure of an asn1 encoded
88 rsa - Manipulate RSA private keys.
89 dsa - Manipulate DSA private keys.
90 dh - Manipulate Diffie-Hellman parameter files.
91 dsaparam- Manipulate and generate DSA parameter files.
92 crl - Manipulate certificate revocation lists.
93 crt2pkcs7- Generate a pkcs7 object containing a crl and a certificate.
94 x509 - Manipulate x509 certificates, self-sign certificates.
95 req - Manipulate PKCS#10 certificate requests and also
96 generate certificate requests.
97 genrsa - Generates an arbitrary sized RSA private key.
98 gendsa - Generates DSA parameters.
99 gendh - Generates a set of Diffie-Hellman parameters, the prime
100 will be a strong prime.
101 ca - Create certificates from PKCS#10 certificate requests.
102 This program also maintains a database of certificates
104 verify - Check x509 certificate signatures.
105 speed - Benchmark OpenSSL's ciphers.
106 s_server- A test SSL server.
107 s_client- A test SSL client.
108 s_time - Benchmark SSL performance of SSL server programs.
109 errstr - Convert from OpenSSL hex error codes to a readable form.
110 nseq - Netscape certificate sequence utility
112 To install this package under a Unix derivative, read the INSTALL file. For
113 a Win32 platform, read the INSTALL.W32 file.
115 For people in the USA, it is possible to compile OpenSSL to use RSA Inc.'s
116 public key library, RSAref. Read doc/ssleay.txt under 'rsaref.doc' on how to
119 Read the documentation in the doc/ directory. It is quite rough, but it
120 lists the functions, you will probably have to look at the code to work out
121 how to used them. Look at the example programs.